General Technical Chat is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls. For modifications, you should check out the Duratec Performance Forum because that's the engine you have. Other performance forums include Wheels, Tires, Brakes and Suspensions and Car Audio and Electronics.

Most mods are street.legal except those that remove the catalytic converter or 02 sensor. A hi flow cat is.a legal catalytic converter that allows for more exhaust gas to flow from the engine, meaning the engine will breathe better causing a gain in horsepower.

I have no cat or anything on my car, race header, exhaust, custom tune, FRPP suspension, among many other mods. I passed inspection even without my header. On newer cars they only run an obd test for CEL error codes. They don't do an actual emissions test.

I have no cat or anything on my car, race header, exhaust, custom tune, FRPP suspension, among many other mods. I passed inspection even without my header. On newer cars they only run an obd test for CEL error codes. They don't do an actual emissions test.

I'm looking to do some mods soon (probably not until next year) and wanted to know what all I could mod (performance wise) while still being legal and able to pass emissions in Texas.

What are you looking for? Another words how far do you want to go? Basic mods= cai/sri, flex back exhaust & a tune w/ get you going. For more add a 23 head w/ a set of cams, a header. Add a dogbone & a STS too.

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